Refine Map interface for stability

src/abstract_tree/assignment.rs

@@ -36,18 +36,6 @@ impl AbstractTree for Assignment {
 
         let statement_node = syntax_node.child(child_count - 1).unwrap();
         let statement = Statement::from_syntax(statement_node, source, context)?;
-        let statement_type = statement.expected_type(context)?;
-
-        let variable_key = identifier.inner().clone();
-        let variable_type = if let Some(definition) = &type_definition {
-            definition.inner().clone()
-        } else {
-            statement_type
-        };
-
-        if let AssignmentOperator::Equal = operator {
-            context.set_type(variable_key, variable_type)?;
-        }
 
         Ok(Assignment {
             identifier,
@@ -59,21 +47,11 @@ impl AbstractTree for Assignment {
     }
 
     fn check_type(&self, source: &str, context: &Map) -> Result<()> {
-        let variables = context.variables()?;
-        let established_type = variables
-            .get(self.identifier.inner())
-            .map(|(_value, _type)| _type);
         let actual_type = self.statement.expected_type(context)?;
 
         if let Some(type_definition) = &self.type_definition {
             match self.operator {
                 AssignmentOperator::Equal => {
-                    if let Some(r#type) = established_type {
-                        r#type.check(&actual_type).map_err(|error| {
-                            error.at_source_position(source, self.syntax_position)
-                        })?;
-                    }
-
                     type_definition
                         .inner()
                         .check(&actual_type)
@@ -97,13 +75,7 @@ impl AbstractTree for Assignment {
             }
         } else {
             match self.operator {
-                AssignmentOperator::Equal => {
+                AssignmentOperator::Equal => {}
-                    if let Some(r#type) = established_type {
-                        r#type.check(&actual_type).map_err(|error| {
-                            error.at_source_position(source, self.syntax_position)
-                        })?;
-                    }
-                }
                 AssignmentOperator::PlusEqual => {
                     if let Type::List(item_type) = self.identifier.expected_type(context)? {
                         item_type.check(&actual_type).map_err(|error| {

src/abstract_tree/built_in_value.rs

@@ -1,4 +1,4 @@
-use std::{env::args, sync::OnceLock};
+use std::{collections::BTreeMap, env::args, sync::OnceLock};
 
 use serde::{Deserialize, Serialize};
 
@@ -89,10 +89,7 @@ impl BuiltInValue {
             BuiltInValue::Length => &Value::Function(Function::BuiltIn(BuiltInFunction::Length)),
             BuiltInValue::Output => &Value::Function(Function::BuiltIn(BuiltInFunction::Output)),
             BuiltInValue::Random => RANDOM.get_or_init(|| {
-                let random_context = Map::new();
+                let mut random_context = BTreeMap::new();
-
-                {
-                    let mut variables = random_context.variables_mut().unwrap();
 
                 for built_in_function in [
                     BuiltInFunction::RandomBoolean,
@@ -104,17 +101,13 @@ impl BuiltInValue {
                     let value = Value::Function(Function::BuiltIn(built_in_function));
                     let r#type = built_in_function.r#type();
 
-                        variables.insert(key, (value, r#type));
+                    random_context.insert(key, (value, r#type));
-                    }
                 }
 
-                Value::Map(random_context)
+                Value::Map(Map::with_variables(random_context))
             }),
             BuiltInValue::String => STRING.get_or_init(|| {
-                let string_context = Map::new();
+                let mut string_context = BTreeMap::new();
-
-                {
-                    let mut variables = string_context.variables_mut().unwrap();
 
                 for string_function in string_functions() {
                     let key = string_function.name().to_string();
@@ -123,11 +116,10 @@ impl BuiltInValue {
                     )));
                     let r#type = string_function.r#type();
 
-                        variables.insert(key, (value, r#type));
+                    string_context.insert(key, (value, r#type));
-                    }
                 }
 
-                Value::Map(string_context)
+                Value::Map(Map::with_variables(string_context))
             }),
         }
     }

src/abstract_tree/function_node.rs

@@ -115,10 +115,6 @@ impl AbstractTree for FunctionNode {
 
         function_context.clone_complex_values_from(context)?;
 
-        for (identifier, r#type) in parameters.iter().zip(parameter_types.iter()) {
-            function_context.set_type(identifier.inner().clone(), r#type.clone())?;
-        }
-
         let body_node = node.child(child_count - 1).unwrap();
         let body = Block::from_syntax(body_node, source, &function_context)?;
 

src/value/map.rs

@@ -8,7 +8,7 @@ use std::{
     collections::BTreeMap,
     fmt::{self, Display, Formatter},
     marker::PhantomData,
-    sync::{Arc, RwLock, RwLockReadGuard, RwLockWriteGuard},
+    sync::{Arc, RwLock, RwLockReadGuard},
 };
 
 use crate::{value::Value, Result, Structure, Type};
@@ -32,6 +32,13 @@ impl Map {
         }
     }
 
+    pub fn with_variables(variables: BTreeMap<String, (Value, Type)>) -> Self {
+        Map {
+            variables: Arc::new(RwLock::new(variables)),
+            structure: None,
+        }
+    }
+
     pub fn clone_from(other: &Self) -> Result<Self> {
         let mut new_map = BTreeMap::new();
 
@@ -48,7 +55,8 @@ impl Map {
     pub fn clone_complex_values_from(&self, other: &Self) -> Result<()> {
         for (key, (value, r#type)) in other.variables()?.iter() {
             if value.is_function() {
-                self.variables_mut()?
+                self.variables
+                    .write()?
                     .insert(key.clone(), (value.clone(), r#type.clone()));
             }
         }
@@ -60,10 +68,6 @@ impl Map {
         Ok(self.variables.read()?)
     }
 
-    pub fn variables_mut(&self) -> Result<RwLockWriteGuard<BTreeMap<String, (Value, Type)>>> {
-        Ok(self.variables.write()?)
-    }
-
     pub fn set(&self, key: String, value: Value) -> Result<Option<(Value, Type)>> {
         log::info!("Setting variable {key} = {value}");
 
@@ -76,12 +80,6 @@ impl Map {
         Ok(previous)
     }
 
-    pub fn set_type(&self, key: String, r#type: Type) -> Result<Option<(Value, Type)>> {
-        let previous = self.variables.write()?.insert(key, (Value::none(), r#type));
-
-        Ok(previous)
-    }
-
     pub fn unset_all(&self) -> Result<()> {
         for (_key, (value, r#_type)) in self.variables.write()?.iter_mut() {
             *value = Value::none();